Alok Jha meets Professor Jim Al-Khalili, physicist and broadcaster of note, to discuss the strange and fast-advancing science of quantum biology. For example, quantum effects may allow European robins to navigate using magnetic fields and plants to photosynthesise.

Alok and Ian are joined by Observer science editor Robin McKie to discuss some of this week's science news, including the near extinction of the Scottish wildcat and a proposed change in UK law that would enable research into treatments for defects in mitochondrial DNA.